Use raw strings for javac colorize regexes

build/android/gyp/javac.py

 #!/usr/bin/env python
 #
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import fnmatch
 import optparse
 import os
 import re
 import sys
 
 from util import build_utils
 from util import md5_check
 
 sys.path.append(build_utils.COLORAMA_ROOT)
 import colorama
 
 
 def ColorJavacOutput(output):
-  fileline_prefix = '(?P<fileline>(?P<file>[-.\w/\\]+.java):(?P<line>[0-9]+):)'
+  fileline_prefix = r'(?P<fileline>(?P<file>[-.\w/\\]+.java):(?P<line>[0-9]+):)'
   warning_re = re.compile(
-      fileline_prefix + '(?P<full_message> warning: (?P<message>.*))$')
+      fileline_prefix + r'(?P<full_message> warning: (?P<message>.*))$')
   error_re = re.compile(
-      fileline_prefix + '(?P<full_message> (?P<message>.*))$')
+      fileline_prefix + r'(?P<full_message> (?P<message>.*))$')
   marker_re = re.compile(r'\s*(?P<marker>\^)\s*$')
 
   warning_color = ['full_message', colorama.Fore.YELLOW + colorama.Style.DIM]
   error_color = ['full_message', colorama.Fore.MAGENTA + colorama.Style.BRIGHT]
   marker_color = ['marker',  colorama.Fore.BLUE + colorama.Style.BRIGHT]
 
   def Colorize(line, regex, color):
     match = regex.match(line)
     start = match.start(color[0])
     end = match.end(color[0])
@@ skipping 100 matching lines @@
   DoJavac(options, args)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main())